module Ransack::Helpers::FormHelper

def search_form_for(record, options = {}, &proc)
  if record.is_a?(Ransack::Search)
    search = record
    options[:url] ||= polymorphic_path(search.klass)
  elsif record.is_a?(Array) && (search = record.detect {|o| o.is_a?(Ransack::Search)})
    options[:url] ||= polymorphic_path(record.map {|o| o.is_a?(Ransack::Search) ? o.klass : o})
  else
    raise ArgumentError, "No Ransack::Search object was provided to search_form_for!"
  end
  options[:html] ||= {}
  html_options = {
    :class  => options[:as] ? "#{options[:as]}_search" : "#{search.klass.to_s.underscore}_search",
    :id => options[:as] ? "#{options[:as]}_search" : "#{search.klass.to_s.underscore}_search",
    :method => :get
  }
  options[:as] ||= 'q'
  options[:html].reverse_merge!(html_options)
  options[:builder] ||= FormBuilder
  form_for(record, options, &proc)
end